- Researching the synthesis process of composite material based on polyaniline and some agriculture wastes such as sawdust, peanut shell, rice husk, rice raw, egg shell.
- Investigating the adsorption ability of some heavy metal ions (Pb, Cd,…) in waste water and regeneration of material, recovery of metal.
- Solution propose of heavy metal treatment from waste water

Theoretical results:
- Successful preparation of some composites based on PANi and agriculture waste (sawdust, peanut shell, rice husk, rice raw, egg shell) by direct and soaking method. From the economic point of view, the soaking method brings uncomfortable because of expensive price of formic acid.
- The obtained maximal adsorption capacities were from 130 to 300 mg/g for Pb2+ and from 91 to 189 mg/g for Cd2+, which depended on kind of agriculture waste.
- Some technology processes have been developed such as synthesis process of material, regeneration process of material, electrolysis process for recovery of metal, static and dynamic adsorption process.
- Sucessful test experiment of static and dynamic adsorption models.
- A test system of dynamic adssorption model (volume of 2L) was designed.
Applied results:
- Used the designed model for treatment of solution containing Pb2+ (5,15 mg/l) and Cd2+ (4,44 mg/l) with removal efficient of > 99% for Pb2+ and > 93% for Cd2+.

- Some composites based on PANi and agricuture waste such as sawdust, peanut shell, rice husk, egg shell and rice raw have been investigated to select the best among them such as PANi-peanut shell which having very high adsorption capacity and well regenerate ability for applying to environmental treatment.
- The static adsorption process of regarded composites followed after Langmuir model. Their adsorption capacities were found from 130 to 300 mg/g for Pb2+ and from 91 to 189 mg/g for Cd2+, which depended on kind of agriculture waste.
- The negative thermodynamic values Go (-5,52÷ -5,65 kJ/mol) indicating that the feasibility and spontaneous nature of the adsorption process for both involved metal ions ocurred on three steps among them the first step is diffusion of the solute from the bulk solution to the external surface of particle, the second one is diffusion from the surface to the internal sites (surface diffusion or pore diffusion) and the third one is adsorption on the interior sites of the adsorbent.
- The regenerated materials indicating that regenerated PANi-peanut shell was the best of them because its maximum adsorption capacity was equal or higher than that of itself in nonregenerated state.
- The dynamic adsorption model for laboratory (volume > 2 L) has been designed due to combining three models such as Bohart-Adam, Thomas and Yoon-Nelson for Pb2+ and Cd2+ adsorption which responded their required outlet concentration.